Our recent paper "Multi-bounce self-mixing in terahertz metasurface external-cavity lasers" has been highlighted as an Editor's Pick in Optics Express! We investigated the effect of controlled optical feedback of a THz QC-VECSEL for the first time, and showed that (a)...

Prof. Benjamin Williams, in collaboration with Aydin Babakhani, Subramanian Iyer in the UCLA ECE Department, and Mitchell Spearrin in the UCLA MAE Department, has been awarded a National Science Foundation Future of Semiconductors (FuSe) grant entitled: "FuSe:...

Perhaps the dominant source for single-frequency THz radiation below 1 THz is the Schottky diode frequency multiplier chain (FMC), in which the nonlinearity of a Schottky diode current-voltage relation is used to generate THz harmonics originating from microwave...

Our collaborators at JPL presented recent progress in our joint work towards the development of THz QC-VECSELs as stable, high-power, and frequency-agile local oscillators at the 32nd IEEE International Symposium on Space Terahertz Technology (ISSTT 2022), held in...

THz metasurface quantum-cascade VECSELs are emerging as broadly tunable single frequency sources of THz radiation in the 1.5-5 THz range, which can deliver output powers of milliwatts to tens of milliwatts, while exhibiting high-quality beam patterns. In this paper we...

The Terahertz and Infrared Photonics group will present several talks at SPIE Photonics West

Recent results show that moving to thinner active regions in THz QC-lasers result in improved thermal properties and higher operating temperatures in continuous-wave mode.

Our paper on patch metasurface VECSELS that dissipate < 1 W power is published in APL.

Our paper on broadband tuning (>20%) of THz QC-lasers in an ultrashort VECSEL cavity is published in Nature Photonics

Our VECSEL makes the cover of IEEE Journal of Selected Topics in Quantum Electronics.

Congratulations to Yu Wu and Anthony Kim for receiving their PhD in 2024!

Yu Wu was awarded 1st place in the “Best Student Oral Presentation Award" competition at MIOMD 2023 in Norman Oklahoma, for her presentation on “RF Injection Locking of THz Metasurface Quantum-Cascade-VECSEL: Effect of Cavity Length Variation” by Yu Wu, C. Curwen, J....

Mohammad Shahili was awarded the "Best Paper Award" at the 2023 Infrared Terahertz Quantum Workshop (ITQW) in Erice, Italy for his presentation on "GaAs-based Quantum Cascade Laser Emitting above 5 THz", with the authors Mohammad Shahili, Sadhvikas J. Addamane,...

The UCLA Electrical & Computer Engineering Department has announced the honorees of the 2022-2023 Samueli Excellence in Teaching Awards. Congratulations to Eilam Morag, who is recognized for his excellence as a teaching assistant for undergraduate classes!

The Electrical & Computer Engineering Department has announced the honorees of the 2020-2021 Samueli Excellence in Teaching Awards. Teaching assistants Hannaneh Hojaiji, Tonmoy Monsoor, Anthony Kim, and Junbo Wang were selected to receive the award out of twelve...

Mohammad Shahili has been selected to receive the prestigious Department of Defense (DoD) National Defense and Engineering Graduate (NDSEG) Fellowship. Awardees receive a competitive package lasting for three years that pays for their tuition and fees, as well as...

Congratulations to Christopher Curwen, who will receive a NASA Postdoctoral Program (NPP) Fellowship starting in 2020. He will work at the Jet Propulsion Laboratory on a project entitled "THz Heterodyne Detector Array Using Quantum Cascade Laser Local Oscillator." He...

Luyao Xu has been awarded the UCLA EE Department “Distinguished PhD Dissertation Award in Physical & Wave Electronics” for 2016-17. Congratulations!

Prof. Williams' Terahertz and Infrared Photonics group is featured in UCLA Engineer Magazine. Link

Prof. Williams is awarded a Presidential Early Career Award for Scientists and Engineers (PECASE).